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Submission #557299

# Submission time Handle Problem Language Result Execution time Memory
557299 2022-05-05T05:51:36 Z Ai7081 Examination (JOI19_examination) C++17
100 / 100
 1947 ms 124040 KB 
#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5;

struct query{
    int x, y, z, idx;
    bool operator < (const query &o) const {return z > o.z;}
};

struct score{
    int a, b;
    bool operator < (const score &o) const {return a+b > o.a+o.b;}
};

int n, t, fenA[N], fenB[N], timer, now, ans[N];
score s[N];
query q[N];
vector<int> fen[N];
set<int> fen_st[N], A, B;
map<int, int> mpA, mpB, mp_fen[N];

void add_set(int i, int val) {
    for (; i<N; i+=i&(-i)) fen_st[i].insert(val);
}

void add(int idx) {
    int i = mpA[s[idx].a];
    for (; i<=A.size(); i+=i&(-i)) {
        fenA[i]++;
        int j = mp_fen[i][s[idx].b];
        for (; j<=mp_fen[i].size(); j+=j&(-j)) fen[i][j]++;
    }
    i = mpB[s[idx].b];
    for (; i<=B.size(); i+=i&(-i)) fenB[i]++;
}

int query(int x, int y) {
    int ret = now;
    auto it = mpA.lower_bound(x);
    if (it != mpA.begin()) {
        int i = mpA[(--it)->first];
        for (; i>0; i-=i&(-i)) {
            ret -= fenA[i];
            it = mp_fen[i].lower_bound(y);
            if (it != mp_fen[i].begin()) {
                int j = mp_fen[i][(--it)->first];
                for (; j>0; j-=j&(-j)) ret += fen[i][j];
            }
        }
    }
    it = mpB.lower_bound(y);
    if (it != mpB.begin()) {
        int i = mpB[(--it)->first];
        for (; i>0; i-=i&(-i)) ret -= fenB[i];
    }
    return ret;
}

int main() {
    scanf(" %d %d", &n, &t);
    for (int i=0; i<n; i++) scanf(" %d %d", &s[i].a, &s[i].b);
    for (int i=0; i<t; i++) scanf(" %d %d %d", &q[i].x, &q[i].y, &q[i].z), q[i].idx = i;
    sort(s, s+n);
    sort(q, q+t);

    // build fenwick tree
    for (int i=0; i<n; i++) A.insert(s[i].a), B.insert(s[i].b);
    timer = 0;
    for (auto it : A) mpA[it] = ++timer;
    timer = 0 ;
    for (auto it : B) mpB[it] = ++timer;
    for (int i=0; i<n; i++) add_set(mpA[s[i].a], s[i].b);
    for (int i=1; i<=mpA.size(); i++) {
        fen[i].assign(fen_st[i].size()+5, 0);
        timer = 0;
        for (auto it : fen_st[i]) mp_fen[i][it] = ++timer;
    }

    // do query
    for (int i=0; i<t; i++) {
        while (now < n && s[now].a + s[now].b >= q[i].z) add(now++);
        ans[q[i].idx] = query(q[i].x, q[i].y);
    }
    for (int i=0; i<n; i++) printf("%d\n", ans[i]);
    return 0;
}

Compilation message

examination.cpp: In function 'void add(int)':
examination.cpp:29:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |     for (; i<=A.size(); i+=i&(-i)) {
      |            ~^~~~~~~~~~
examination.cpp:32:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::map<int, int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         for (; j<=mp_fen[i].size(); j+=j&(-j)) fen[i][j]++;
      |                ~^~~~~~~~~~~~~~~~~~
examination.cpp:35:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::set<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     for (; i<=B.size(); i+=i&(-i)) fenB[i]++;
      |            ~^~~~~~~~~~
examination.cpp: In function 'int main()':
examination.cpp:74:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::map<int, int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   74 |     for (int i=1; i<=mpA.size(); i++) {
      |                   ~^~~~~~~~~~~~
examination.cpp:61:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |     scanf(" %d %d", &n, &t);
      |     ~~~~~^~~~~~~~~~~~~~~~~~
examination.cpp:62:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |     for (int i=0; i<n; i++) scanf(" %d %d", &s[i].a, &s[i].b);
      |                             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
examination.cpp:63:34: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |     for (int i=0; i<t; i++) scanf(" %d %d %d", &q[i].x, &q[i].y, &q[i].z), q[i].idx = i;
      |                             ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
2.0 / 2.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 6 ms 12080 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 7 ms 11976 KB Output is correct
7 Correct 23 ms 15316 KB Output is correct
8 Correct 24 ms 15360 KB Output is correct
9 Correct 25 ms 15368 KB Output is correct
10 Correct 12 ms 13140 KB Output is correct
11 Correct 21 ms 14968 KB Output is correct
12 Correct 9 ms 12116 KB Output is correct
13 Correct 26 ms 15236 KB Output is correct
14 Correct 24 ms 15380 KB Output is correct
15 Correct 23 ms 15324 KB Output is correct
16 Correct 17 ms 14996 KB Output is correct
17 Correct 11 ms 12756 KB Output is correct
18 Correct 8 ms 12108 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1677 ms 109572 KB Output is correct
2 Correct 1687 ms 109384 KB Output is correct
3 Correct 1689 ms 109472 KB Output is correct
4 Correct 293 ms 43396 KB Output is correct
5 Correct 739 ms 79168 KB Output is correct
6 Correct 88 ms 15308 KB Output is correct
7 Correct 1252 ms 109504 KB Output is correct
8 Correct 1365 ms 109488 KB Output is correct
9 Correct 1143 ms 109436 KB Output is correct
10 Correct 513 ms 75044 KB Output is correct
11 Correct 186 ms 29244 KB Output is correct
12 Correct 64 ms 14896 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 1677 ms 109572 KB Output is correct
2 Correct 1687 ms 109384 KB Output is correct
3 Correct 1689 ms 109472 KB Output is correct
4 Correct 293 ms 43396 KB Output is correct
5 Correct 739 ms 79168 KB Output is correct
6 Correct 88 ms 15308 KB Output is correct
7 Correct 1252 ms 109504 KB Output is correct
8 Correct 1365 ms 109488 KB Output is correct
9 Correct 1143 ms 109436 KB Output is correct
10 Correct 513 ms 75044 KB Output is correct
11 Correct 186 ms 29244 KB Output is correct
12 Correct 64 ms 14896 KB Output is correct
13 Correct 1792 ms 109380 KB Output is correct
14 Correct 1757 ms 109476 KB Output is correct
15 Correct 1626 ms 109600 KB Output is correct
16 Correct 314 ms 43468 KB Output is correct
17 Correct 749 ms 79144 KB Output is correct
18 Correct 89 ms 15308 KB Output is correct
19 Correct 1757 ms 109556 KB Output is correct
20 Correct 1787 ms 109504 KB Output is correct
21 Correct 1525 ms 109548 KB Output is correct
22 Correct 511 ms 75260 KB Output is correct
23 Correct 188 ms 29152 KB Output is correct
24 Correct 63 ms 14928 KB Output is correct

Subtask #4
57.0 / 57.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 11988 KB Output is correct
2 Correct 6 ms 11988 KB Output is correct
3 Correct 6 ms 12080 KB Output is correct
4 Correct 6 ms 11988 KB Output is correct
5 Correct 6 ms 11988 KB Output is correct
6 Correct 7 ms 11976 KB Output is correct
7 Correct 23 ms 15316 KB Output is correct
8 Correct 24 ms 15360 KB Output is correct
9 Correct 25 ms 15368 KB Output is correct
10 Correct 12 ms 13140 KB Output is correct
11 Correct 21 ms 14968 KB Output is correct
12 Correct 9 ms 12116 KB Output is correct
13 Correct 26 ms 15236 KB Output is correct
14 Correct 24 ms 15380 KB Output is correct
15 Correct 23 ms 15324 KB Output is correct
16 Correct 17 ms 14996 KB Output is correct
17 Correct 11 ms 12756 KB Output is correct
18 Correct 8 ms 12108 KB Output is correct
19 Correct 1677 ms 109572 KB Output is correct
20 Correct 1687 ms 109384 KB Output is correct
21 Correct 1689 ms 109472 KB Output is correct
22 Correct 293 ms 43396 KB Output is correct
23 Correct 739 ms 79168 KB Output is correct
24 Correct 88 ms 15308 KB Output is correct
25 Correct 1252 ms 109504 KB Output is correct
26 Correct 1365 ms 109488 KB Output is correct
27 Correct 1143 ms 109436 KB Output is correct
28 Correct 513 ms 75044 KB Output is correct
29 Correct 186 ms 29244 KB Output is correct
30 Correct 64 ms 14896 KB Output is correct
31 Correct 1792 ms 109380 KB Output is correct
32 Correct 1757 ms 109476 KB Output is correct
33 Correct 1626 ms 109600 KB Output is correct
34 Correct 314 ms 43468 KB Output is correct
35 Correct 749 ms 79144 KB Output is correct
36 Correct 89 ms 15308 KB Output is correct
37 Correct 1757 ms 109556 KB Output is correct
38 Correct 1787 ms 109504 KB Output is correct
39 Correct 1525 ms 109548 KB Output is correct
40 Correct 511 ms 75260 KB Output is correct
41 Correct 188 ms 29152 KB Output is correct
42 Correct 63 ms 14928 KB Output is correct
43 Correct 1947 ms 124040 KB Output is correct
44 Correct 1940 ms 124020 KB Output is correct
45 Correct 1922 ms 123920 KB Output is correct
46 Correct 368 ms 51684 KB Output is correct
47 Correct 979 ms 108828 KB Output is correct
48 Correct 88 ms 15012 KB Output is correct
49 Correct 1528 ms 123984 KB Output is correct
50 Correct 1767 ms 123912 KB Output is correct
51 Correct 1418 ms 123924 KB Output is correct
52 Correct 690 ms 109756 KB Output is correct
53 Correct 248 ms 37464 KB Output is correct